The ReactX midsole offers full-length responsiveness. It gives you a stable, plush sensation that helps your legs fresh, which is crucial for optimizing speed and leaping ability. The upper is made a synthetic material that helps prevent unnecessary movement and provides necessary ventilation for all-day wear. The outsole is made of a rubber compound that gives you optimal lateral support both indoors and outdoors. It stretches from the toe tip around the heel for enhance durability. Supportive lacing and webbing offer a secure fit. Perforations in high-wear areas like the Swoosh logo toe offer optimal ventilation.